409] LARVAE OF THE TENTHREDINOIDEA—YUASA 91 



height; antennae with four segments, segments small, incomplete, with 

 large sensory (?) pits, segments sometimes fused in part; spiracles not 

 winged. 



This genus is represented by a single unidentified species collected by 

 Chester Young on Salix at Ithaca, New York. The larva is unique in the 

 character of the legs in that the trochanter is longer than the femur. 

 That this species belongs to the Nematinae is unquestionable but it is not 

 closely related to any genus in particular except perhaps to Pontania. 

 It may represent an undescribed genus. 



Species 1. — Length, 10.5 mm.; body greenish; head brownish with dorsal 

 half of front dark fuscous; labrum semicircular with slight mesal emar- 

 gination; maxillary palpi with segment 1 nearly as long as segment 2 

 which is cylindrical and as wide at distal end as at proximal, segment 3 

 much smaller, segment 4 minute, peg-like, two distal segments curved 

 mesad; galea conical, only slightly larger than labial palpi; thoracic legs 

 with coxae subequal in length to tibiae, with trochanter slightly shorter 

 than coxa, and as long on dorsal margin as on ventral, femur shorter 

 than trochanter, cylindrical, three-fourths as wide as long, tarsal claws 

 slightly curved; larvapods with 1-2 setae near cephalic aspect; setae 

 slender, not stiff, rather sparse; tenth abdominal tergum rounded on 

 caudal margin, with few setae; subanal lobe with several setae; abdominal 

 segments with subspiracular areas with two setae and surpedal areas with a 

 single setae; on Salix nigra; C-c.y.-77. 



Subfamily Blennocampinae 



Larvae (Figs. 19-20) moderately large; body subcyHndrical, sometimes 

 rather robust, tapering uniformly caudad, venter more or less flattened, 

 usually distinctly spinose; segmentation distinct; annulation indistinct; 

 third abdominal segment with five or six annulets, rarely apparently with 

 four; thorax sometimes thickened; thoracic legs well developed, normal, 

 tibia shorter than or subequal to femur; femur produced ventro-distad as 

 pointed membranous projection; larvapods on segments 2-8 and 10, normal 

 in form, glabrous, subsegmented, distal lobe truncate on distal margin 

 and often curved mesad; tenth abdominal segment usually with several 

 spines arranged in a transverse row along caudal margin; suranal and sub- 

 anal lobes with several setae; head small, sparsely setiferous, narrower than 

 thorax, front slightly convex; antennae with five segments, slender, elon- 

 gately conical; ventral glands wanting; glandubae sometimes present; 

 spiracles rarely winged; spines often very long, furcate, with two, three, or 

 five branches, barbed, or represented by conical tubercles or sometimes 

 reduced to short bifurcate tubercles; cuticle microscopically and densely 

 spinulate; ultimate stage occurs, in which all setae and spines are lost and 



